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EP0018934B1 - Safety device for cutting machines with vertical cutters - Google Patents

Safety device for cutting machines with vertical cutters Download PDF

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Publication number
EP0018934B1
EP0018934B1 EP80450001A EP80450001A EP0018934B1 EP 0018934 B1 EP0018934 B1 EP 0018934B1 EP 80450001 A EP80450001 A EP 80450001A EP 80450001 A EP80450001 A EP 80450001A EP 0018934 B1 EP0018934 B1 EP 0018934B1
Authority
EP
European Patent Office
Prior art keywords
bar
wheel
slide
safety device
handle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP80450001A
Other languages
German (de)
French (fr)
Other versions
EP0018934A1 (en
Inventor
Claude Creton
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to AT80450001T priority Critical patent/ATE4682T1/en
Publication of EP0018934A1 publication Critical patent/EP0018934A1/en
Application granted granted Critical
Publication of EP0018934B1 publication Critical patent/EP0018934B1/en
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16P—SAFETY DEVICES IN GENERAL; SAFETY DEVICES FOR PRESSES
    • F16P3/00—Safety devices acting in conjunction with the control or operation of a machine; Control arrangements requiring the simultaneous use of two or more parts of the body
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/22—Safety devices specially adapted for cutting machines
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S83/00—Cutting
    • Y10S83/01—Safety devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/21—Elements
    • Y10T74/2193—Guard mechanisms
    • Y10T74/2198—Operator controlled
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/872—With guard means

Definitions

  • the present invention relates to a protective device adaptable to cutters with vertical blades comprising a fairing sheet and blade protection fixed on a sliding bar in a vertical slide fixed on the cutter, the elevation of the sheet being generated by contact d 'An animated wheel in rotation resting on the bar, the descent being caused when the wheel of the bar becomes clueless.
  • a protection device is known from US-A 3939749.
  • the object of the invention is to provide a protection device for cutters with vertical blades of the above type and in particular having a simpler starting and interrupting mechanism and offering increased security.
  • the protection device comprises a fairing and protection sheet 1 fixed on a movable bar 2 sliding in a slide 3 fixed to the cutter 4.
  • the displacement of the bar 2 in the slide 3 causing the erasing of the fairing and protection sheet is generated by a rubberized wheel 5 bearing on the bar 2, said wheel 5 is rotated by a gear motor 6 fixed on the support plate 7 articulated at 8 on the slide 3.
  • the start-up of the geared motor 6 and therefore the erasing of the fairing sheet 1 takes place when the handle 9 of the machine 4 is gripped for directing said machine and this at the simple contact of the human skin which excites the coil of relay 10 provided with an electromagnet 13, coupled with the gear motor 6, the excitation of the coil of relay 10 which causes it to stick is caused when the two poles each constituted by a separate metal wire, 11 and 12, incrusted tee and helically wound on the handle, are connected by the simple contact of human skin.
  • the raising and / or clearing of the fairing sheet 1 is interrupted at top dead center by means of a limit switch not shown.
  • the relay 10 When the handle is released and therefore the connection of the two poles 11 and 12 is interrupted, the relay 10 is at rest and energizes the electromagnet 13 with a pushing plunger 13a having the role of disabling the wheel rubberized 5 of the bar 2 by the simple action of a lever arm 14 articulated at 15 and rod 16 bearing on the slide 3, said rod 6 being guided as shown in fig. 2, causing the rotation of the support plate 7 thus releasing the bar 2 which by its simple gravity and that of the fairing sheet 1 descends to bottom dead center, a limit switch not shown has the function of interrupting the tension.
  • the continued support of the rubberized wheel 5 on the bar 2 is caused by a return spring 17 connecting the support plate 7 to the slide 3.
  • the device is modified at level of the electromagnet 13 with plunger core, in fact the latter is disposed opposite, that is to say that when the electromagnet is energized, exclusively when the handle 9 is grasped, the core plunger 13b compresses a leaf spring 18 fixed on the support plate 7 between the slide 3 and the electromagnet 13 which has the effect of releasing the lever arm 14 and thereby causing the support of the rubberized wheel 5 on the bar 2.
  • the electromagnet 13 When the handle 9 is released or when the electrical voltage for operating the machine is voluntarily or involuntarily interrupted, the electromagnet 13 is no longer energized, on the other hand the plunger core 13b is biased by the leaf spring 18 which causes the acti the plunger core 13b is on the lever arm 14 and therefore the rubberized wheel 5 gets out of the way of the bar 2 and of the fairing sheet 1.
  • the device which is the subject of the invention can be used whenever mobile protection with vertical displacement is necessary both for cutters with vertical blades and for all other machines whose use presents a danger.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Details Of Cutting Devices (AREA)
  • Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Knives (AREA)
  • Control Of Cutting Processes (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Harvester Elements (AREA)
  • Sawing (AREA)

Abstract

Protection device adapted for use with a vertical blade cutter comprising a cutting blade. The device comprises a moveable plate for covering the blade and protecting against accidental contact with the blade. The moveable plate is adapted to be retracted during cutting and is further adapted to be otherwise lowered in front of the blade. A bar is provided which is adapted to slide in a guide adapted to be attached to the cutter. The moveable plate is mounted on the bar. A plate support is journaled onto the guide. A rotatable wheel is attached to the plate support. The rotatable wheel, when brought into contact with the bar while rotating, is adapted to raise the bar and moveable plate and whereas disengagement of the wheel from the bar causes the moveable plate to be lowered in front of the blade by virtue of its own weight and that of the plate.

Description

La présente invention concerne un dispositif de protection adaptable aux coupeuses à lames verticales comprenant une tôle de carénage et de protection de la lame fixée sur un barreau coulissant dans une glissière verticale fixée sur la coupeuse, l'élévation de la tôle étant engendrée par contact d'une roue animée en rotation s'appuyant sur le barreau, la descente étant provoquée lors du désemparage de la roue du barreau. Un tel dispositif de protection est connu du brevet US-A 3939749.The present invention relates to a protective device adaptable to cutters with vertical blades comprising a fairing sheet and blade protection fixed on a sliding bar in a vertical slide fixed on the cutter, the elevation of the sheet being generated by contact d 'An animated wheel in rotation resting on the bar, the descent being caused when the wheel of the bar becomes clueless. Such a protection device is known from US-A 3939749.

L'invention a pour but de réaliser un dispositif de protection pour coupeuses à lames verticales du type ci-dessus et possédant en particulier un mécanisme de mise en marche et d'interruption plus simple et offrant une sécurité accrue.The object of the invention is to provide a protection device for cutters with vertical blades of the above type and in particular having a simpler starting and interrupting mechanism and offering increased security.

Ce but est obtenu par la rotation de la roue au moyen d'un moto-réducteur solidaire d'une plaque support articulée sur la glissière lors de la préhension de la poignée servant à diriger la coupeuse, ladite poignée étant pourvue de deux fils incrustés enroulés en hélicoïde constituant deux pôles dont la liaison au contact de la peau humaine établit la mise en marche du moto-réducteur.This object is obtained by the rotation of the wheel by means of a geared motor secured to a support plate articulated on the slide during the gripping of the handle used to direct the cutter, said handle being provided with two embedded inlaid wires. in a helicoid constituting two poles, the connection of which in contact with human skin establishes the starting of the geared motor.

D'autres caractéristiques et avantages de l'invention ressortiront plus clairement de la description qui va suivre faite en regard des dessins joints donnés à titre d'exemple non limitatif, où:

  • - la fig. 1 représente une vue de profil du dispositif en cours d'effacement,
  • - la fig. 2, une vue de profil du dispositif en position abaissée,
  • - la fig. 3, une vue de dessus du dispositif,
  • - la fig. 4, une variante de réalisation permettant la retombée du dispositif de protection en cas d'arrêt d'alimentation de courant, tant volontaire qu'involontaire, la figure représentant le dispositif de protection abaissé,
  • - la fig. 5, la variante de réalisation, le dispositif de protection en cours d'élévation et/ou d'effacement.
Other characteristics and advantages of the invention will emerge more clearly from the description which follows, given with regard to the accompanying drawings given by way of nonlimiting example, where:
  • - fig. 1 represents a profile view of the device being erased,
  • - fig. 2, a side view of the device in the lowered position,
  • - fig. 3, a top view of the device,
  • - fig. 4, an alternative embodiment allowing the fallout of the protection device in the event of a power supply interruption, both voluntary and involuntary, the figure representing the protection device lowered,
  • - fig. 5, the variant embodiment, the protection device during elevation and / or erasure.

Tel que représenté figs 1, 2 et 3, le dispositif de protection comporte une tôle de carénage et de protection 1 fixée sur un barreau mobile 2 coulissant dans une glissière 3 fixée à la coupeuse 4. Le déplacement du barreau 2 dans la glissière 3 provoquant l'effacement de la tôle de carénage et de protection est engendré par une roue caoutchoutée 5 en appui sur le barreau 2, ladite roue 5 est entraînée en rotation par un moto-réducteur 6 fixé sur la plaque support 7 articulée en 8 sur la glissière 3. La mise en marche du moto-réducteur 6 et de ce fait l'effacement de la tôle de carénage 1 a lieu lors de la préhension de la poignée 9 de la machine 4 servant à diriger ladite machine et ce au simple contact de la peau humaine qui fait exciter la bobine du relais 10 dotée d'un électroaimant 13, couplée avec le moto-réducteur 6, l'excitation de la bobine du relais 10 qui fait coller celui-ci est provoquée lorsque les deux pôles constitués chacun par un fil métallique séparé, 11 et 12, incrusté et enroulé en hélicoïde sur la poignée, sont reliés par le simple contact de la peau humaine. L'élévation et/ou effacement de la tôle de carénage 1 est interrompue au point mort haut au moyen d'un fin de course non représenté. Lorsqu'on libère la poignée et de ce fait que l'on interrompt la liaison des deux pôles 11 et 12, le relais 10 est au repos et met sous tension l'électroaimant 13 à noyau plongeur poussant 13a ayant pour rôle de désemparer la roue caoutchoutée 5 du barreau 2 par la simple action d'un bras de levier 14 articulé en 15 et tige 16 en appui sur la glissière 3, ladite tige 6 étant guidée comme représenté fig. 2, provoquant la rotation de la plaque support 7 libérant ainsi le barreau 2 qui par sa simple pesanteur et celle de la tôle de carénage 1 redescend au point mort bas, un fin de course non représenté a pour fonction d'interrompre la tension. Le maintien en appui de la roue caoutchoutée 5 sur le barreau 2 est provoqué par un ressort de rappel 17 reliant la plaque support 7 à la glissière 3.As shown in FIGS. 1, 2 and 3, the protection device comprises a fairing and protection sheet 1 fixed on a movable bar 2 sliding in a slide 3 fixed to the cutter 4. The displacement of the bar 2 in the slide 3 causing the erasing of the fairing and protection sheet is generated by a rubberized wheel 5 bearing on the bar 2, said wheel 5 is rotated by a gear motor 6 fixed on the support plate 7 articulated at 8 on the slide 3. The start-up of the geared motor 6 and therefore the erasing of the fairing sheet 1 takes place when the handle 9 of the machine 4 is gripped for directing said machine and this at the simple contact of the human skin which excites the coil of relay 10 provided with an electromagnet 13, coupled with the gear motor 6, the excitation of the coil of relay 10 which causes it to stick is caused when the two poles each constituted by a separate metal wire, 11 and 12, incrusted tee and helically wound on the handle, are connected by the simple contact of human skin. The raising and / or clearing of the fairing sheet 1 is interrupted at top dead center by means of a limit switch not shown. When the handle is released and therefore the connection of the two poles 11 and 12 is interrupted, the relay 10 is at rest and energizes the electromagnet 13 with a pushing plunger 13a having the role of disabling the wheel rubberized 5 of the bar 2 by the simple action of a lever arm 14 articulated at 15 and rod 16 bearing on the slide 3, said rod 6 being guided as shown in fig. 2, causing the rotation of the support plate 7 thus releasing the bar 2 which by its simple gravity and that of the fairing sheet 1 descends to bottom dead center, a limit switch not shown has the function of interrupting the tension. The continued support of the rubberized wheel 5 on the bar 2 is caused by a return spring 17 connecting the support plate 7 to the slide 3.

Suivant un autre mode de réalisation représenté figs 4 et 5, afin que la tôle de carénage 1 redescende tant lorsqu'on libère la poignée 9 que lorsqu'on interrompt volontairement le courant ou que celui-ci soit interrompu involontairement, le dispositif est modifié au niveau de l'électro-aimant 13 à noyau plongeur, en effet celui-ci est disposé à l'opposé c'est-à-dire que lorsque l'électroaimant est sous tension, exclusivement lorsqu'on saisit la poignée 9, le noyau plongeur 13b comprime une lame ressort 18 fixée sur la plaque support 7 entre la glissière 3 et l'électro-aimant 13 ce qui a pour effet de libérer le bras de levier 14 et de ce fait provoquer l'appui de la roue caoutchoutée 5 sur le barreau 2. Lorsque la poignée 9 est libérée ou que la tension électrique permettant de faire marcher la machine est interrompue volontairement ou involontairement, l'électroaimant 13 n'est plus sous tension, par contre le noyau plongeur 13b est sollicité par la lame ressort 18 qui provoque l'action du noyau plongeur 13b sur le bras de levier 14 et de ce fait désempare la roue caoutchoutée 5 du barreau 2 et de la tôle de carénage 1.According to another embodiment shown in FIGS. 4 and 5, so that the fairing sheet 1 goes back down as much when the handle 9 is released as when the current is voluntarily interrupted or the latter is interrupted involuntarily, the device is modified at level of the electromagnet 13 with plunger core, in fact the latter is disposed opposite, that is to say that when the electromagnet is energized, exclusively when the handle 9 is grasped, the core plunger 13b compresses a leaf spring 18 fixed on the support plate 7 between the slide 3 and the electromagnet 13 which has the effect of releasing the lever arm 14 and thereby causing the support of the rubberized wheel 5 on the bar 2. When the handle 9 is released or when the electrical voltage for operating the machine is voluntarily or involuntarily interrupted, the electromagnet 13 is no longer energized, on the other hand the plunger core 13b is biased by the leaf spring 18 which causes the acti the plunger core 13b is on the lever arm 14 and therefore the rubberized wheel 5 gets out of the way of the bar 2 and of the fairing sheet 1.

Le dispositif objet de l'invention peut être utilisé chaque fois qu'une protection mobile à déplacement vertical est nécessaire tant pour les coupeuses à lames verticales que pour toutes autres machines dont l'usage présente un danger.The device which is the subject of the invention can be used whenever mobile protection with vertical displacement is necessary both for cutters with vertical blades and for all other machines whose use presents a danger.

Claims (5)

1. A safety device adaptable to vertical blades cutters incorporating a mobile metal sheet guard (1) fixed to a bar (2) moving in a vertical slide (3) itself fastened to the cutter (4) to shield and protect the blade, the up movement of the guard (1) being produced by the contact of a rotating wheel (5) bearing a bar (2), the down movement being initiated when wheel (5) looses contact with bar (2) characteristically featured by the spinning of wheel (5) by means of a geared motor (6) fastened to a supporting plate (7) hinged at (8) to slide (3) when handle (9) by means of which the cutter is aimed, is held, the handle (9) being provided with two inlaid wires (11) and (12) helicoidaly wound and constitutive of two poles their connection by means of the human skin starts the geared motor (6).
2. A safety device adaptable to vertical blades cutters according to claim 1, characteristically featured by the release of handle (9) causing the activation of an electromagnet (13) with inside core (13a) which pushes a rocker arm (14) pivoted at (15) prolongated by rod (16) bearing on slide (3) so as to produce the rotation of supporting plate (7) hinged at (8) in order to lift wheel (5) from bar (2) so that bar (2) and guard (1) return by gravity only to their lowest neutral position where a safety switch cuts off the electromagnet connection.
3. A safety device adaptable to vertical blades cutters according to claim 1, characteristically featured by wheel (5) being maintained in contact with bar (2) by means of a return spring (17) fastened to slide (3) and to hinged supporting plate (7).
4. A safety device adaptable to vertical blades cutters according to claim 1, characteristically featured by the lifting of wheel (5) from mobile bar (2) being triggered by flat spring (18) activating inside core (13b) and thus pushing rocker arm (14) pivoted at (15) when the electrical connection in cutoff either due to the release of handle (9) or the current failure.
5. A safety device adaptable to vertical blades cutters according to claims 1 and 4, characteristically featured by the activation of the electro magnet (13) when handle (9) is held triggering the compression of flat spring (18) thus setting free, rocker arm (14) and wheel (5) till then bearing on sliding bar (2) under the action of return spring (17) fastened to slide (3) and to the hinged supporting plate (7).
EP80450001A 1979-04-26 1980-04-25 Safety device for cutting machines with vertical cutters Expired EP0018934B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80450001T ATE4682T1 (en) 1979-04-26 1980-04-25 PROTECTION DEVICE FOR CUTTING MACHINE WITH VERTICAL BLADES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7911214 1979-04-26
FR7911214A FR2454882B1 (en) 1979-04-26 1979-04-26 PROTECTIVE DEVICE ADAPTABLE TO VERTICAL BLADE CUTTERS

Publications (2)

Publication Number Publication Date
EP0018934A1 EP0018934A1 (en) 1980-11-12
EP0018934B1 true EP0018934B1 (en) 1983-09-21

Family

ID=9225003

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80450001A Expired EP0018934B1 (en) 1979-04-26 1980-04-25 Safety device for cutting machines with vertical cutters

Country Status (8)

Country Link
US (1) US4325186A (en)
EP (1) EP0018934B1 (en)
JP (1) JPS55144997A (en)
AT (1) ATE4682T1 (en)
CA (1) CA1156549A (en)
DE (1) DE3064889D1 (en)
ES (1) ES490930A0 (en)
FR (1) FR2454882B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796526A (en) * 1983-06-27 1989-01-10 Pitney Bowes Inc. Value printing die protection device in an electronic postage meter machine
US4996742A (en) * 1989-10-26 1991-03-05 Townsend Engineering Company Safety method and means for stopping and starting meat skinning machines
JP3026301B2 (en) * 1991-05-31 2000-03-27 株式会社ケーエム裁断機 Cutting machine
US5283955A (en) * 1993-05-11 1994-02-08 Liang Cheng K Contact and induction cutting machine
CN112140179A (en) * 2020-09-25 2020-12-29 湖南金立星机械科技有限公司 Motor mounting rack, swing cutting mechanism and double-head cutting machine

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1283895A (en) * 1918-04-03 1918-11-05 Robert A Read Cloth-cutter guard.
DE343997C (en) * 1920-08-04 1921-11-12 Laurent Semat On and off switch for electrically controlled devices on vehicles equipped with a steering element
US2862297A (en) * 1956-04-05 1958-12-02 Scintilla Ltd Portable cutting apparatus
US3026503A (en) * 1957-11-13 1962-03-20 Donald W Scheer Sleep warning system for vehicle operator
GB1443001A (en) * 1973-03-28 1976-07-21 Dunlop Ltd Safety devices for machine tools
SE7308217L (en) * 1973-06-12 1974-12-13 Isaksson Ove Gustav
US3848502A (en) * 1973-11-05 1974-11-19 Neill E O Safety device for protecting an operator{40 s hands
DE2425531C3 (en) * 1974-05-27 1978-09-28 Bizerba-Werke Wilhelm Kraut Kg, 7460 Balingen Protective device for covering the saw blade of a band saw, in particular a meat and bone saw
US4024633A (en) * 1975-11-28 1977-05-24 The Wolf Machine Company Simplified safety guard for a cloth cutting machine

Also Published As

Publication number Publication date
ES8100949A1 (en) 1980-12-01
FR2454882A1 (en) 1980-11-21
ATE4682T1 (en) 1983-10-15
US4325186A (en) 1982-04-20
EP0018934A1 (en) 1980-11-12
JPS55144997A (en) 1980-11-12
CA1156549A (en) 1983-11-08
DE3064889D1 (en) 1983-10-27
FR2454882B1 (en) 1986-03-28
ES490930A0 (en) 1980-12-01

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